7261438
Descripción
Test por John Loughlin, actualizado hace más de 1 año
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Creado por John Loughlin
hace casi 8 años
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Pregunta 1
Pregunta
Genetics is the study of:
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The nucleus
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RNA
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DNA
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Inheritance
Pregunta 2
Pregunta
Inheritance is:
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The passing on of traits from one generation to the next.
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The passing on of cells from one generation to the next.
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The passing on of proteins from one generation to the next.
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The passing on of ideas from one generation to the next.
Pregunta 3
Pregunta
A gamete is:
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A diploid cell
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A triploid cell
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A haploid sex cell
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A bacterial cell
Pregunta 4
Pregunta
Meiosis is important in sexual reproduction because it produces:
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New cells
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Sex cells
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Diploid cells
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Zygotes
Pregunta 5
Pregunta
In humans there are ___________ chromosomes in each sex cell.
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46
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23
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92
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22
Pregunta 6
Pregunta
Fertilisation is:
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The fusion of two diploid cells to form a diploid zygote
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The fusion of two haploid cells to form a diploid zygote
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The fusion of a diploid cell and a haploid cell to form a diploid zygote
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The fusion of two haploid cells to form a haploid zygote
Pregunta 7
Pregunta
An alternative form of a gene is known as:
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An allele
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A locus
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A gentoype
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A phenotype
Pregunta 8
Pregunta
A locus is:
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The position of a chromosome in a cell
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The position of a gene on a chromosome
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The position of a protein on a chromosome
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The position of a cell in the body
Pregunta 9
Pregunta
Which of the following terms correctly describes the situation when two alleles are identical?
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Heterozygous
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Dominance
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Recessive
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Homozygous
Pregunta 10
Pregunta
Which of the following terms correctly describes the situation when two alleles are different?
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Homozygous
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Heterozygous
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Recessive
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Dominance
Pregunta 11
Pregunta
Pure-breeding means the same as:
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Homozygous
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Heterozygous
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Recessive
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Dominance
Pregunta 12
Pregunta
Dominance in genetics refers to:
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Where one allele has very little effect over another allele
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Where one allele is as effective as another allele
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Where one allele complements the effect of another allele
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Where one allele masks the effect of another allele
Pregunta 13
Pregunta
Recessive in genetics refers to:
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When an allele's effect is only expressed in the heterozygous condition
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When an allele's effect is only expressed in the homozygous condition
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When an allele's effect is never expressed
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When an allele's effect is always expressed
Pregunta 14
Pregunta
Genotype of an individual refers to its:
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Genetic make-up
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Physical make-up
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Physiological make-up
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Psychological make-up
Pregunta 15
Pregunta
Phenotype of an individual refers to:
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Physical make-up
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Genetic make-up
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Psychological make-up
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Physiological make-up
Pregunta 16
Pregunta
A man with brown eyes and the genotype, BB and a woman with blue eyes and the gentoype, bb have a child. What will the genotype and phenotype of that child be?
Respuesta
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BB and brown eyes
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Bb and brown eyes
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Bb and blue eyes
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bb and blue eyes
Pregunta 17
Pregunta
A man and a woman both with brown eyes and the genotype, Bb have have a child. What is the correct ratio of brown eyes : blue eyes with regard to all the offsprings' phenotypes?
Respuesta
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1:1
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2:1
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3:1
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1:3
Pregunta 18
Pregunta
Which of the following genotypes correctly describes a human male?
Respuesta
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X
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Y
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XY
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XX
Pregunta 19
Pregunta
Which of the following genotypes correctly describes a human female?
Respuesta
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X
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Y
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XY
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XX
Pregunta 20
Pregunta
Which of the following genotypes correctly describes a male bird?
Respuesta
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X
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Y
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XY
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XX
Pregunta 21
Pregunta
Which of the following genotypes correctly describes a female bird?
Respuesta
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X
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Y
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XY
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XX
Pregunta 22
Pregunta
How many different possible gametes are there from an individual with the genotype XY?
Respuesta
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1
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2
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3
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4
Pregunta 23
Pregunta
How many different possible gametes are there from an individual with the genotype XX?
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1
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2
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3
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4
Pregunta 24
Pregunta
Incomplete dominance in genetics refers to:
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alleles of an allelic pairs are equally expressed
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alleles of an allelic pairs are not equally expressed
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alleles of an allelic pairs are incompletely expressed
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alleles of an allelic pairs are not expressed at all
Pregunta 25
Pregunta
A genetic cross between a red-flowered snapdragon plant and a white-flowered snapdragon plant demonstrated incomplete dominance. What colour were the flowers of the resulting offspring?
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White
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Red
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Pink
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Red and white
Pregunta 26
Pregunta
A genetic cross between two pink-flowered snapdragon plants produced a red, pink and white flowered plants in the resultant offspring. Which of the following ratios is correct for the resultant phenotypes (red : pink : white)?
Respuesta
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1:3:1
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1:2:1
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1:1:1
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1:4:1
Pregunta 27
Pregunta
Who is known as the father of genetics?
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Henry Dixon
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John Joly
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Gregor Mendel
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Alfred Russell-Wallace
Pregunta 28
Pregunta
The Law of Segregation states that:
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Cells have two factors for each trait and these factors separate at fertilisation
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Cells have two factors for each trait and these factors separate at gamete formation
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Cells have one factor for each trait and this factor separates from all others at gamete formation
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Cells have one factor for each trait and this factor joins with other factors at gamete formation
Pregunta 29
Pregunta
The Law of Independent Assortment states that:
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Either member of a pair of factors can fuse with either member of another pair at gamete formation
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Either member of a pair of factors can combine with either member of another pair at gamete formation
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Either member of a pair of factors cannot separate from either member of another pair at gamete formation
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Either member of a pair of factors will separate from each other at gamete formation
Pregunta 30
Pregunta
A pure-breeding pea plant for purple flowers and round seeds was crossed with a pure-breeding pea plant for white flowers and wrinkled seeds. All of the offspring from this cross produced purple flowers and round seeds. The offspring were 'selfed' and the F2 progeny produced showed 4 different phenotypes in a specific ratio. Which is the correct ratio of the F2 phenotypes?
Respuesta
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1:1:1:1
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4:3:2:1
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9:3:3:1
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9:6:3:1
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